Draft-pipe and damper construction for heaters



Mar. 13, 1923. 1,447,985

J. w. JONES ET AL.

DRAFT PIPE AND DAMPER CONSTRUCTION FOR HEATERS Filed June 7, 1921INVENTORS.

1 v ATTORNEYS.

Patented Mar. 13, 1923.

as at JOHN W. JONES AND WALTER S. REYNOLDS, OF SYRACUSE, NEW YORK. I

DRAFT-PIPE AND DAMPER CONSTRUCTION FOR HEATERS.

Application filed June 7, 1921. semi No. 475,665. A

States, and residents of Syracuse, in the,

county of Onondaga and State of New York,

. have invented a certain new and useful Draft-Pipe and DamperConstruction for Heaters, of which the following is a specification. 7

This invention relates to heaters and has for its object a particularlysimple, eflicient and compact arrangement of the draft pipe and dampers,and means for controlling the opening and closing of one damper from theother. The invention consists in the novel features and in thecombinations and constructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanyingdrawing in which like characters designate corresponding parts in allthe views.

Figure 1 is an elevation, partly in section of a heater embodying ourinvention.

Figure 2 is an enlarged sectional View through the draft pipeillustrating the op eration of the dampers.

l designates the heater having a draft pipe 2, the heater here shownbeing of the type for heating the water of a hot water circulatingsystem and having a thermostatic or other device 3 operated by thetemperature or pressure of the water in any well known manner.

The construction of this device forms no part of our invention, and asthe construction thereof is well known to those skilled in the art,further description is thought to be unnecessary.

This invention comprises a draft pipe for heaters, such pipe having asmoke chamber extending horizontally transversely thereof and formedwith an air inlet in one of its lateral sides, the lower part of the.pipe proper opening through the bottom of the chamber and the outletbeing through the top of the chamber, such chamber being of greatertransverse dimension than the draft pipe whereby the chamber is anenlargement of the draft pipe, a damper for controlling the passage forthe pipe'into the chamber through the bottom thereof, a damper forcontrolling the air inlet, and means for controlling the dampers.

The damper mechanism comprises two versing means between the damperswhereby the opening of one damper-causes, the other damper to close andthe closing of the first damper causes the other damper to open, andmeans for controlling the opening and closing of the first damper;

, dampers and motion transmitting and 136- In the illustrated form ofthis invention,f

the dampersare gravity operated, that is, they are moved to their closedposition by gravity.

20 is the horizontally and transversely eX- tending chamber orenlargement of the'draft,

pipe. 7 p

4 and 5 designate the dampers, the damper '4 being located in theupright portion of the draft pipe and movable vertically toward and fromthe seat 6 therein, and the damper 5 being arranged to control the coldair inlet 7 of'the draft pipe, this inlet extending laterally from theupright portion of the draft pipe and above the seat 6. The.

motion transmitting and reversing means between the dampers 5, 6includes a lever 8 pivoted at 9 between its ends to the draft pipe andconnected atone end by a suitable link 10 to the damper 4 and having itsother arm 11 extending into and lengthwise of the air inlet andarranged-in the path of the damper 5 in order to be en-' gaged andoperated thereby when the damper 5 approaches its closed position. Thedamper 5 is here shown as a flap pivoted at its The damper 5 is operatedby the thermostatic means 3 which as here illustrated has an arm 13connected by a link 14 to the damper 5, the arm being provided with asuitable weight 15 which acts to closethe damper 5.

Owing to the chamber 20 beingan en-m largement of the smoke pipe, theconstruction of the heater itself is simplified and also the dampercontrol can be applied to any heater by supplying the heater with thesmoke pipe having the transverse enlargement or smoke chamber and thedampers associated with such chamber.

In operation, as the temperature r ses or the water expands, thethermostat or .srmi

lar device 3 lifts the arm 13 causing the arm to open the cold airdamper 5 and close the damper 4 and as the temperature drops, the arm 13drops and the Weight 5 thereof closes the cold air damper 5 and opensthe damper 4c.

l/Vhat we claim is:'

1. In a heater, a draft pipe having a chamber estendinghorizontallytransversely thereof, the chamber having an air inlet in one of itslateral sides and the pipe proper opening through the bottom of thechamber, a damper for controlling the passage from the pipe into "thechamber through the bot tom thereof, a damper for controlling the airinlet and means for operating the dampers, substantially as and for thepurpose described.

2.111 a heater, a draft pipe having a chamber extending horizontallytransversely thereof,-the chamber being of greater dimension than thedraft pipe, whereby the chamber is an enlargement of the draft pipe, thechamber being formed with an air inletin one of its lateral sides, adamper foreontrolling the passage from the pipe into the chamber throughthe bottom thereof, a damper for controlling the air inlet and means forcontrolling the dampers, substantially as and for thepurpose specified.

In a heater, a draft pipe having an upwardly extending portion providedwith a chamber extending horizontally trans versely of the upwardlyextending portion of the pipe, the chamber being of greater dimensionthan the draft pipe, whereby the chamber is an enlargement of the draftpipe, the chamber being formed with an air inlet in one of its lateralsides, a damper for controlling the passage from the pipe into thechamber through the bottom thereof, a damper for controlling the airinlet and means for operating the dampers, substantially as and for thepurpose set forth.

In testimony whereof, we havehereunto signed our names at Syracuse, inthe county ofOnondaga and State of New York, this 9th day of April,1921.

JOHN WV. JONES. WALTER S. REYNOLDS.

